Mike Belotti didn't go down to D2, but he found Chip Kelly by looking at FCS stats & calling the OC of the best statistical offense.
I also always liked that Stoops got the Florida DC job because Nebraska scored 62 on Florida in the 95 Fiesta Bowl & Spurrier figured he'd have to play them again in 96, so he just decided to hire the DC that he thought did the best job against the 95 Huskers from watching tape prepping for the Fiesta Bowl.